Its no secret that beautiful, healthy trees make your yard look spectacular. Jobes Fertilizer Spikes for Trees and Shrubs ensure a continuous supply of nutrients below the surface, where the trees active roots are growing. Jobes Spikes are easy to insert around each trees dripline and the slow-release formula lasts all season. No wasteful runoff, no mess, hazards or smells - only a safe beautiful yard. For best results, use Jobes Fertilizer Spikes for Trees and Shrubs in early spring and late fall.